PDF Encrypt Tool 3.5

PDF Encrypt Tool can be used to protect your PDF files with 128-bit strength user and owner passwords, set all permissions(such as coping, editing, printing, selecting text and graphics, fill in etc), and prevent PDF files from being printed, changed, copied, extracted, signed, filled, assembled and/or merged. It is the fast, affordable way to encrypt a lot of pdf files to encrypted pdf files once time for saving your time! Its easy-to-use interface allows you to encrypt PDF files by simply few clicks. And PDF Encrypt Tool don't need any software such as adobe acrobat.

How does it work? (Using PDF to Text Converter)
There two passwords you can apply to a PDF. The first is the owner password. Opening a PDF with this password will allow you full access to the PDF when a user password has been assigned as well. This means that even if printing was disabled you will still be able to print the PDF when using this password. No password will be prompted for when opening the PDF if you secure it with only an owner password. The second is the user password. Opening a PDF with this password will restrict you based on how the PDF was password protected (printing may be disabled, for instance).

It is very powerful and easy-to-use!
It supports batch Encrypt mode.
It supports all popular PDF formats.
It supports 40-bit Encryption and Adobe Advanced 128-bit Encryption.
It can be run independently,does not need Adobe Acrobat.

Home Page - http://www.pdf-convert.com/pdf-encrypt-tool/index.htm